QC35 II constantly disconnecting and connecting to iPhone X
I use my QC35 II headphones mostly with my work MacBook Pro, connected via bluetooth. I also have them connected to my iPhone X, which has the Bose Connect app. They seem to be constantly disconnecting and reconnecting to the iPhone, every few minutes. It's so bad that I had to turn off voice prompts just to make it through conference calls while connected to my laptop.
I've tried forgetting the headphones from both iPhone and MBP, and resetting them up. I've gone through reset steps I've found on other forum posts. And I've updated firmware. I love the quality of the audio, but if this continues I'm going to have to add the hassle of disabling them on all but 1 device at a time. I don't believe I noticed this issue for the first month or two that I had them (purchased in late Nov 2018). Please help!
Firmware version: 4.3.6
Bose Connect version: 8.0.0
iOS version: 12.1.4 (I see 12.2 is available, and will be updating)